Write a program that will determine if a given matrix represents a quandle. A quandle is a set equipped with a single (non-commutative, non-associative) operation ◃ which obeys the following axioms:
The operation is closed, meaning that a◃b = c is always an element of the set if a and b are el...
Magic the Gathering: Friends or Foes?
code-golfgamecard-gamesdecision-problem
In the card game Magic: the Gathering there are five different colours, which represent loose affiliations of cards, White (W), Blue (U), Black (B), Red (R) and Green (G). These are often arranged in a pentagon as fol...
Background
Brag is a card game similar in concept to, but simpler than, poker. A hand in brag consists of three cards and is ranked as follows from highest to lowest:
Three of a kind - all three cards the same rank. Named as "three Kings" etc.
Running flush aka straight flush. All three cards ...
...and real golf for my code friends.
This is a challenge based on a one year old XKCD comic which consists mostly of toasts (parodies of the first in the comic) following a distinct pattern, but with some slight variation. Your task is to write a program that takes the first half of any toa...
It is probably not a shock to most of you, but I really enjoy answering code golf questions in Vim. There are many vim plugins that could greatly shorten some answers. For example, surround, subvert, easymotion, and many others could potentially save many bytes on the right challenge.
I've been ...
